Table 3 Treatment results of magnetic resonance-guided high-intensity focused ultrasound for groups 1 and 2

Acoustic sonication power (W)

141.0 ± 25.4 (90–250)

138.6 ± 25.9 (90–180)

142 ± 25.3 (100–250)

0.602

Treatment duration (min)

127.9 ± 55.0 (41–379)

125.4 ± 73.2 (61–379)

128.8 ± 47 (41–258)

0.808

Treatment speed (ml/min)

1.04 ± 0.61 (0.09–2.49)

1.08 ± 0.63 (0.25–2.18)

1.03 ± 0.61 (0.09–2.49)

0.740

 overall

33.0 ± 12.2 (14–67)

32.3 ± 15.2 (14–67)

33.2 ± 10.9 (15–65)

0.763

  4 mm

9.5 ± 12.1 (1–39)

11.8 ± 18.3 (1–39)

8.0 ± 7.4 (1–17)

0.659

  8 mm

13.3 ± 10.3 (1–48)

9.1 ± 8.4 (3–28)

14.6 ± 10.6 (1–48)

0.191

  12 mm

11.7 ± 9.3 (1–45)

12.8 ± 8.6 (2–30)

11.2 ± 9.7 (1–45)

0.607

  14 mm

17.4 ± 12.7 (1–50)

19.9 ± 14.0 (1–50)

16.4 ± 12.2 (1–39)

0.385

  16 mm

16.5 ± 14.1 (1–53)

12.5 ± 14.9 (1–46)

17.7 ± 13.9 (1–53)

0.366

NPV ratio (%)

90.3 ± 13.6 (32.0–100.0)

87.0 ± 14.1 (57.5–100.0)

91.5 ± 13.3 (32.0–100.0)

0.205